Automatic burner tip



Sept. 9 1924.

l w. SCHMITZ AUTOMATIC BURNER TIP Filed April 28. 192s IN VEN TOR ,@ssl

I A TTORNE Y Patented Sept. 9, 1924.

UNITED STATES WILLIAM SCHMITZ,

PATENT o'FF1cE- OF NEW YORK, N. Y`

AUTOMATIC BURNER TIP.

Y Application filed April 28, 1923. Serial No.l 635,213.-

To all whom t may concern.'

Be it known that I, IVILLIAM SCHMITZ, a citizen of the United States, residing at New York, in the county of New York and State vof New York, have invented certain new and 4useful Improvements in Automatic Burner Tips, of which the following is a specification.

This-Invention relates to gas burners, and

has for its object to provide a safety device therefor, whereby, when the gas iame becomes extinguished, the flow of gaswill be automatically stopped. Y

Y `lWith this object in view, my invention consists in the provision of a thermostatic means` in the burnertip Vand of a valve controlling thefow of gas through said tip and adaptedpt'o be automatically acted upon by saidthermostatic means, so that the lat-` ter, -whenthe gas'flame is extinguished, will permit'- the valve to close, or when the iiame ision, will hold the valve open.

, I amaware of the severall patented devices designed for the same object, but to my knowledge, owing tothe nature of their device without departingfroni the principle ofmy invention, I do not wish to restrict myself to the detailsshown and described.

i. Inl-they accompanying drawing, in whichy similar .reference characters denote corresponding parts, Fig. lis a longitudinal section ofthe gas burner equipped with my device; Fig..2fis a longitudinal section yatV a right angle to the one of Fig..1; Fig. 2ak is` an elevation of the 'thermostatic element; Fig is a cross section on line 3-3 ofFig. 2;-F ig. 4 is-a similar section to Fig. 2, show-V ing the valve-open; Fig. 5 is a perspective v iewofa detail of the device; Fig. Gris an elevation of the burner equippedV with-the de-' vice yslightly `modified in. construction and" Figif? is a:longitudinal.section of the gas burnenof said modified safety device.

Y, Referring to Figs. 1 to 5, in which vthe preferred form of construction of my device is illustrated, a, denotes the burner tube and b the hollow burner tip of usual lconstruction fitted snugly in the upper end of the lburner tube. The device comprises a cup shapedl member 10 adapted to be stationarily-supported in the bottom of the hollow tip, as by friction or otherwise. This cup'is formed in its center with an openingll, servingias gas passage and with diametrically opposed upright arms 12, each compose'dof two metallic strips-of different thermostatic proper-1 ties, vso as to bend-inwardly or towardoneanother, when heatedby the gasi'fla'me', and outwardly or away from one another', whenthe flame is extinguished.V `The free eirdflQ of each arm is curved inwardly anddownwardly and terminates in a broadened por'-v tion 122 (FigsJl, 2 and 2a). These ends nor-' inally, i. e. in a cool state, are separated a certain distance, but under thevinfluence of heat are adapted to lcloselike lthe jaws of' a pair of pincers. 13 denotes-a member preferably punched out from ajblanki or piece of thin sheet metal into a substantially oval loop. The upper part 13 of said 'loop serving as head piece-is-adapt'edto movably fit in the slot b of the lburner tip" and to be rectilinearly guided-therein by lateral guide'. grooves or`slots132, formed' on its linner cross edgeand spaced aparta distance' equal to the diameter 'of the tip, each slot' in wid-th being equal to or slightlyv larger than the thickness ofv the circumferentialwallf of" the tip o, so as to slidably engage said wall.- The central part ofv said thead piece lfhasa downwardly or inwardly directed extension 133 of reduced widthforming'a stem eXtending in the same plane as the body portion 'of said head piece and adapted, when the cupi() and loop 13 are mounted in the tip, `to pass through the gas passage 11-'with sufficient clearance as not to obstruct the passage-'of gastherethrough. The lower or outer end of said stem is formed to a valve byxing to ita gasket 14 consisting of washers of suitable material4 and fixed in position, -as

by bending over the eXtreme end ofthe stem, as at 134k or otherwise. Said valvek servesfto `control the flow fof gas through said gaspas spring 15, which has theftendenoy' tomove.

the loop and thereby the =valve upwardly, wherebythe gas passage ll-becomes closed.I

The part 136 of the loop below the head piece is bent laterally, so that, when.v the parts are assembled in the burner, it will extend outside of the latter embracing a portion of the outer face of the gas burner. The lower end of said loop is perforated as at 137 for the attachment of a chain 16 or the like, whereby lthe valve may be operated from the outside, when it is desired to ignite the gas jet.

In operation the valve, under the action of the spring 15, holds the gas passage 11 closed. In this position, the loop 13 occupies its uppermost position with its head piece 13 extending through the space formed between the two thermostatic arms 12, the latter being then separated or bent away from. each other, as heretofore stated. `When it is desired to ignite the gas, the member or loop 13 is pulled down by means of the chain 16, thereby pushing the valve down and opening the gas passage 11. The gas iiame will cause the theremostatic arms 12 instantaneously to bend inwardly with their broadened ends closing over the outer edge of head piece 13 of the loop 13 and thereby holding the latter and consequently the valve 14 down against the action of the spring 15. On the extinguishment of the gas flame, the thermostatic arms under the changing temperature will bend 'away from each other and release the loop 13, thereby permitting the spring 15 to thrust it upwardly, closing the valve.

In the modification, shown in Figs. 6 and 7, the lower looped part 136 of the member 13 is omitted and the chain is attached to the side flaps 138 extending outwardly through the slot Zn of the tip b. Instead of two thermostatic arms, only one may be used, as shown in Fig. 7.

Vhat I claim is 1. In a safety device for gas burners, the combination with a standard gas tip, of thermostatic means supported within said tip and a manually operable valve in said tip for controlling communication between said burner and said tip and capable of being automatically controlled by said thermostatic means.

2. In a safety device for gas burners, the combination with the gas tip, of a thermostatic means stationarily supported in said tip, a manually operable resilientvmember movably borne in said tip and extending outwardly through its mouth, a valve on said member for controlling communication between said burner and said tip, said thermostatic means being adapted, on ignition of the gas jet, to engage said member and thereby hold the valve open, and on extinguishment of the iame to release said member and permit said valve to close.

3. In a safety device for gas burners, the combination with the burner tip, of a member fixed therein and formed with thermostatic elements, a spring actuated manually operable valve for contro-lling communication between said burner and tip, said valve being formed with a member extending l through said tip and through the path of said elements, so that, when the gas burns, said thermostatic elements will engage said spring actuated member to hold the valve open and on extinguishment, the iame will release said member and permit the valve to close.

4L. In a safety device for gas burners,- the combination with the burner tip, of Va mem;

ber fixed in position in said tip and formed with oppositely arranged thermostatic arms,

a manually operable member extending through said tip between said arms and resiliently supported on said lirst member and a valve formed on the outer end of said; member, adapted to control communication between said burner and tip, said thermostatic elements being adapted, when heated, to engage said manually operable member to hold said valve open and when cooled, to release the same to close the valve.

5. In a-safety device for gas burners, the.

the valve open, and when Cooled, release' said member permitting the` valve to close.

6. A safety device for gas burners, comprising a. pair of oppositely working rigidly connected thermostatic arms, adapted to be stationarily mounted in the gas tip and a looped member resiliently supported between said arms and having a stem extending through said tip and the lower yend of which is formed to the valve, the upper end of said member being adapted to be acted upon by said arms vand to be operable from the outside of said burner. f

7 A safety device forl a gas burner, com'- prising a cup shaped member having a central opening formed with two oppositely acting thermostatic elements, ya member formed with a stem adapted to project with one end through said opening and with the other end between said elements, a spring supported in said cup around said stem to normally project said member upwardly through the space between the free ends of said elements, a valve formed on the outer end of said stem to close said opening, and means connected to said member for the manual operation of said valve.

8. In a safety device of the character described, a member punched out of sheet metal to form an angularly bent loop, lateral guide grooves and a centrally and longitudinally extending tongue or stem.

9. In a safety device of the character described, a cup shaped piece formed with an opening in its bottom and two diametrically opposed arms, extending from the marginal edge of said cup, said arms being of bimetallic material of different thermostatic properties. y

10. In a safety device for gas burners, a standard gas tip, thermostatic means con- 15 nected with said tip and a valve movably tip, of a valve for controlling the flow of gas borne within said tip.

In testimony whereof I a-fIiX myI signature 1n presencel of two witnesses.

y VWILLIAM SCHMITZ.,

Witnesses:

MAX `D. `ORDMANN JOSEPH T. MGMAHON. 

